| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical sheet in which a light shielding characteristic of a light shielding part is high and stripe mottles of brightness and darkness cannot be easily conspicuous. <P>SOLUTION: The optical sheet 1 has a viewing angle control layer 2 in which a prism rows 11 and the light shielding parts 20 are alternately arranged and the light shielding part 20 has a cross section of an nearly V shape in an arrangement direction. In the cross section of the nearly V shape, C<SB>1</SB>wt.% of first light shielding particles with a particle size of ≥W<SB>0.1</SB>and C<SB>2</SB>wt.% of second light shielding particles with a particle size of <W<SB>0.1</SB>are contained and expressions (1), (2) are satisfied, wherein H(μm) denotes height, W(μm) denotes maximum width and width of the light shielding part at a distance of 0.1H(μm) from a V top end part is W<SB>0.1</SB>(μm).(1) 10≤C<SB>1</SB>×W≤1000, (2) 1≤C<SB>2</SB>×W<SB>0.1</SB>≤100. <P>COPYRIGHT: (C)2009,JPO&INPIT |
